> > The hard limit on VAXen is 24MB of data.  This is because the page
> > table design on VAX consumes an incredible amount of memory, so
> > increasing it will steal much static allocated memory.
> 
> Seems to me the *right* fix for this is to make userland page tables
> pageable (or at least swappable).
> 
They _are_ pageable. The problem is the parts of the kernel page table
that must map the user page tables, that must be in physical contiguous
memory and therefore allocated at boot.

-- Ragge